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GTR Home > Conditions/Phenotypes > Mismatch repair cancer syndrome 1

Summary

Excerpted from the GeneReview: Lynch Syndrome
Lynch syndrome is characterized by an increased risk for colorectal cancer (CRC) and cancers of the endometrium, ovary, stomach, small bowel, urinary tract, biliary tract, brain (usually glioblastoma), skin (sebaceous adenomas, sebaceous carcinomas, and keratoacanthomas), pancreas, and prostate. Cancer risks and age of onset vary depending on the associated gene. Several other cancer types have been reported to occur in individuals with Lynch syndrome (e.g., breast, sarcomas, adrenocortical carcinoma). However, the data are not sufficient to demonstrate that the risk of developing these cancers is increased in individuals with Lynch syndrome.

Genes See tests for all associated and related genes

  • Also known as: COCA2, FCC2, HNPCC, HNPCC2, LYNCH2, MLH-1, MMRCS1, hMLH1, MLH1
    Summary: mutL homolog 1

Clinical features

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Practice guidelines

  • ACMG ACT, 2019
    American College of Medical Genetics and Genomics, Genomic Testing (Secondary Findings) ACT Sheet, MLH1, MSH2, MSH6, PMS2, EPCAM Pathogenic Variants, Lynch Syndrome (Hereditary Non-polyposis Colon Cancer [HNPCC]), 2019

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